package main

import "fmt"

// + 法运算
func main(){


	var i = 1
	var j = 2
	var r = i + j   //做加法运算
	fmt.Println("r = ", r)  //r =  3


	var str1 = "hello "
	var str2 = "world"
	var res = str1 + str2   //做拼接操作
	fmt.Println("res = ", res)  //res =  hello world
}